P0442 2006 Nissan Maxima Code - EVAP Control System Leak Detected Small Leak
Quick Answer
The Engine Control Module (ECM) tests the Evaporative Emission (EVAP) system for the following conditions: - Large and small leaks - Excess vacuum - Purge flow during non-commanded conditions - Fuel Level and Fuel Pressure sensor faults - EVAP Purge and Vent Valve faults The ECM monitors the Fuel Tank Pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0442 2006 Nissan Maxima indicates EVAP Control System Leak Detected Small Leak.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0442 2006 Nissan Maxima Description
- Large and small leaks
- Excess vacuum
- Purge flow during non-commanded conditions
- Fuel Level and Fuel Pressure sensor faults
- EVAP Purge and Vent Valve faults
The ECM monitors the Fuel Tank Pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. The ECM commands both the EVAP Purge Solenoid and the EVAP Vent Valve ON when the conditions are met in order to apply an engine vacuum to the EVAP system. The ECM commands the EVAP Purge Solenoid OFF once the system has reached a predetermined level of vacuum. This test verifies if a vacuum can be achieved in the EVAP system. Failure to develop a vacuum may be caused by a large leak or a restriction.
What are the Possible Causes of the DTC P0442 2006 Nissan Maxima?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
How to Fix the DTC P0442 2006 Nissan Maxima?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
There is a factory Nissan service bulletin to help diagnose the P0442 code:
Nissan Factory Service Bulletin OBDII Code P0442
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0442 2006 Nissan Maxima code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0442 2006 Nissan Maxima Code
1. What does the OBDII code P0442 mean on a 2006 Nissan Maxima?
P0442 indicates a small leak in the EVAP (Evaporative Emission Control) system, which is responsible for preventing fuel vapors from escaping into the atmosphere.
2. What are the common symptoms of code P0442 in a 2006 Nissan Maxima?
Symptoms may include an illuminated check engine light, a faint fuel smell near the vehicle, and in rare cases, slightly reduced fuel efficiency.
3. What causes the P0442 code on a 2006 Nissan Maxima?
Common causes include a loose or damaged gas cap, cracked or leaking EVAP hoses, a faulty purge valve, or a malfunctioning EVAP canister.
4. Can a loose gas cap trigger the P0442 code in a 2006 Nissan Maxima?
Yes, a loose or improperly sealed gas cap is one of the most frequent causes of the P0442 small leak code.
5. How do you diagnose the P0442 code on a 2006 Nissan Maxima?
Start by inspecting the gas cap for damage or looseness. If the cap is fine, check EVAP system hoses, connections, and components for leaks or damage. A smoke test may be needed for hard-to-detect leaks.
6. Is it safe to drive a 2006 Nissan Maxima with the P0442 code?
Yes, it is generally safe to drive with this code, but it’s best to address the issue promptly to prevent increased emissions and potential damage to the EVAP system.
7. How do you fix the P0442 code on a 2006 Nissan Maxima?
Common fixes include tightening or replacing the gas cap, repairing or replacing leaking EVAP hoses, or replacing faulty EVAP system components like the purge valve or charcoal canister.
8. How much does it cost to fix the P0442 code on a 2006 Nissan Maxima?
Costs can vary widely depending on the issue. A gas cap replacement may cost around $20, while repairs involving EVAP system components may range from $100 to $500.
9. Can extreme weather conditions cause the P0442 code on a 2006 Nissan Maxima?
Yes, extreme heat or cold can cause EVAP system components to expand, contract, or degrade, potentially leading to small leaks.
10. Will clearing the P0442 code fix the problem on a 2006 Nissan Maxima?
Clearing the code will turn off the check engine light temporarily, but if the underlying issue isn’t resolved, the code will likely return.
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